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Details
| Specification | Value |
|---|---|
| Brand | FILTRON |
| MPN | k1378 |
| Category | Filter, interior air |
| Length [mm] | 310 mm |
| Width [mm] | 219 mm |
| Height [mm] | 30 mm |
| Version with active carbon (Art. No.) | K 1378A |
OE/OEM numbers (3)
Search by this OE number to find compatible parts
- VAG—4M0 819 439
- VAG—4M0 819 439 C
- VAG—8W0 819 439
Where this part fits
Original-fit position for OE 4M0819439C. The red ring marks where this part installs on the vehicle.
About this product
Sourced from FILTRON, this filter, interior air (K 1378) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Length [mm]: 310 mm, Width [mm]: 219 mm, Height [mm]: 30 mm, Filter type: 21, Version with active carbon (Art. No.): K 1378A — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit AUDI, BENTLEY, LAMBORGHINI models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 100365, 1123190024, 1690955080, 17602 and 39 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FILTRON is a recognised supplier of automotive filtration components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Suitable cars
Equivalent products (41)
Show all 41 OE numbers
Filter, interior air FILTRON K 1378 — compatible car models
| Car models | AUDI: A4 Allroad B9 (8WH, 8WJ), A4 B9 (8W2, 8WC), A4 B9 Avant (8W5, 8WD), A5 Avant (FU5), A5 Convertible (F57, F5E), A5 (F53, F5P), A5 (FU2), A5 Sportback (F5A, F5F), A6 Allroad C8 (4AH), A6 C8 (4A2) (+11 more); BENTLEY: BENTAYGA (4V1); LAMBORGHINI: URUS |
|---|---|
| Engines | 2.0 TDI quattro; 1.4 TFSI; 2.0 TDI; 40 TDI Mild Hybrid quattro; 30 TDI Mild Hybrid; 35 TDI Mild Hybrid; 45 TDI quattro; 50 quattro; 3.0 SQ5 TDI Mild Hybrid quattro; 3.0 Hybrid; 4.0 All-wheel Drive |
| Year of manufacture | 2015-2025 |
| Manufacturer article number (MPN) | K 1378 |
| OE part numbers | 4M0 819 439, 4M0 819 439 C, 8W0 819 439 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
FILTRON k1378 Filter, interior air. EU General Product Safety Regulation (GPSR): 2. Filter type: 21. Height [mm]: 30 mm. Length [mm]: 310 mm. Version with active carbon (Art. No.): K 1378A. Width [mm]: 219 mm
- 1x Filter, interior air
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Filter, interior air compatible with my car?
This Filter, interior air fits AUDI, BENTLEY, LAMBORGHINI vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this FILTRON Filter, interior air have?
This FILTRON Filter, interior air has the following specifications: Length [mm]: 310 mm; Width [mm]: 219 mm; Height [mm]: 30 mm; Filter type: 21; Version with active carbon (Art. No.): K 1378A; EU General Product Safety Regulation (GPSR): 2. Check the full specifications table above for complete details.
What OE part numbers does this Filter, interior air replace?
This Filter, interior air replaces OE part numbers: 4M0 819 439, 4M0 819 439 C, 8W0 819 439. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Filter, interior air cost?
This FILTRON Filter, interior air is available for £16.99. Filter, interior air prices vary depending on brand, specifications, and vehicle compatibility. FILTRON parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Filter, interior air?
Replace when you notice reduced airflow from the HVAC system, persistent musty odours, increased noise when the fan is running, or fogging windows. Most cabin filters should be changed every 15,000-25,000 miles.
What tools do I need to replace a Filter, interior air?
Tools needed: flat-head screwdriver or 8mm socket may be required to remove the glove box (location and access varies by model -- check the vehicle handbook). Difficulty: Easy DIY. Safety warning: Wear a dust mask when removing a heavily contaminated cabin filter -- it traps fine particulates, allergens, and bacteria.
Can I use this part as a replacement for OE 4M0 819 439?
Yes, this FILTRON Filter, interior air is a direct replacement for OE part number 4M0 819 439. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
